Degraded Drive but both Online?

Hi,
I have a My Book Duo 12TB set up as RAID 1.
THe orange light began to flash and the Drive Utilities says I have a degraded drive. However underneath it say both drives are online.
I don’t know which drive is degraded to replace.
Also it has passed the Status Check and Quick Drive Test but the Complete Drive Test just gets stuck at 10%.

I can access my files still, I assume this is using only one drive. Need advice as how to proceed to fix.

Thanks

Hi @gj1985,

Please contact the WD Technical Support team for best assistance and troubleshooting:
https://support-en.wd.com/app/ask